221213212210 has 32 divisors (see below), whose sum is σ = 399548712960. Its totient is φ = 88182464832.

The previous prime is 221213212193. The next prime is 221213212211. The reversal of 221213212210 is 12212312122.

221213212210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221213212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3595527 + ... + 3656533.

It is an arithmetic number, because the mean of its divisors is an integer number (12485897280).

Almost surely, 2^221213212210 is an apocalyptic number.

221213212210 is a deficient number, since it is larger than the sum of its proper divisors (178335500750).

221213212210 is a wasteful number, since it uses less digits than its factorization.

221213212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62250.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221213212210 its reverse (12212312122), we get a palindrome (233425524332).

The spelling of 221213212210 in words is "two hundred twenty-one billion, two hundred thirteen million, two hundred twelve thousand, two hundred ten".